For the equipment connected to the three-phase or single-phase grid, the power factor represents an efficiency measure for the usage of electrical energy. The power factor improvement through correction methods reduces the load on the transformers and power conductors, leading to a reduction of losses in the mains power supply and a sustainable grid system. The implications at the financial level are also important. An example of load that generates a small power factor is represented by a motor without mechanical load or having a small mechanical load. Given the power factor correction (PFC), the costs are reduced through the elimination of penalties, applying only in the common coupling point (CCP). The advantages of using equipment for the power factor correction are related also to their long operation duration and the easiness of their installation. The device presented in this article takes advantage of the advances in information and communication technology (ICT) to create a new approach for telemetry and remote configuration of a PFC. This approach has flexibility and versatility, such that it can be adapted to many loads, easily changing the capacitance steps and settings of the power factor correction device.

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Whether it is using renewable energy photovoltaic or wind type, the problem is that this energy to be delivered at constant parameters. Classic storage on lithium-ion or lead-acid battery, ensure some stability of the voltage supplied, but when new alternative storage solutions arise, the stability of the voltage supplied can be improve. For example, for systems off -grid can go on the DC-DC converters. Article proposes a study on replacing classic batteries with supercapacitors battery and converter pair. Supercapacitor can be considered a promising device. It can be used virtually maintenance free. It is analyzed several operating schematics (inverter and SEPIC) of buck-boost type converters that can be used together with supercapacitors. The converter is designed to maintain a constant output. Designing such a converter is, considering the work situation, to achieve high efficiency and a wide range of input voltage.

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